日期:2014-05-17 浏览次数:20513 次
----------------------------------------------------------------
-- Author :DBA_Huangzj(發糞塗牆)
-- Date :2014-01-02 13:26:31
-- Version:
-- Microsoft SQL Server 2012 (SP1) - 11.0.3128.0 (X64)
-- Dec 28 2012 20:23:12
-- Copyright (c) Microsoft Corporation
-- Enterprise Edition (64-bit) on Windows NT 6.2 <X64> (Build 9200: )
--
----------------------------------------------------------------
--> 测试数据:[table1]
if object_id('[table1]') is not null drop table [table1]
go
create table [table1]([id] int,[name] varchar(6))
insert [table1]
select 1,'pa2323' union all
select 2,'wa1232' union all
select 3,'ya9823' union all
select 4,'mn2342' union all
select 5,'pa1232' union all
select 6,'ui1232'
--------------开始查询--------------------------
select top 5 left(name,2) '以字母开头',count(left(name,2)) '数量'
from table1
group by left(name,2)
order by count(left(name,2)) desc
----------------结果----------------------------
/*
以字母开头 数量
----- -----------
pa 2
ya 1
wa 1
ui 1
mn 1
*/
select top 5
substring(name,1,2) as name,
COUNT(*) cc
from table1
group by substring(name,1,2)
order by&